What is the meaning of Eam?

Uncle.

accusative feminine singular of is: "her", "it" (referring to feminine nouns), or demonstratively (as a demonstrative pronoun) "this", "that" (likewise referring to feminine nouns).

first-person singular present active subjunctive of eō

alternative form of em

uncle

Mercian and Early West Saxon form of eom

you (second-person pronoun, nominative case, plural)

Source: wiktionary.org